Carpenter&#39;s rule.



No. 643,204. Patented Feb. l3, I900.

J. F. BOSE.

CARPENTERS RULE.

(Application filed May 2, 1899.)

(No Model.)

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I ATES PATENT QFFICE.

JOSEPH F. ROSE, OF TIVERTON, RI-IODE ISLAND.

CARPENTERS RULE.

SPECIFICATION forming part of Letters Patent No. 643,204, dated February13, 1900. Application filed May 2, 1899. Serial No. 715,285. (No model.)

T0 at whom it may concern.-

Be it known that I, JOSEPH F. ROSE, a citizen of the United States,residing at Tiverton, in the county of Newport and State of RhodeIsland, have invented certain new and useful Improvements in CarpentersRules, of which the following is a full and complete specification, suchas will enable those skilled in the art to which it appertains to makeand use the same.

This invention relates to carpenters rules, and has more particularreference to a device of this class whereby accurate lines and curvesmay be drawn and numerous varied tests and measurements be made.

The invention is fully disclosed in the following specification, ofwhich the accompanying drawings form a part, in which like referencecharacters denote like parts in the several views, and in which-- Figure1 is a plan View of a rule constructed according to my invention; Fig.2, a detail View, partly in section, on the line 2 2 of a portionthereof; and Fig. 3, an edge view of a portion thereof.

Referring more particularly to the drawings, Ct is the body portion ofmy improved rule, which is of wood, metal, or any suitablyrigid materialand provided at one edge with a beveled portion, as at b, and thebeveled portion I) is provided with the usual scale, consisting ofnumbered graduations c.

The upper surface of the rule-body a is provided with a longitudinalgroove d, and said rule-body is slotted longitudinally, as at e, fromone end and through a predetermined extent thereof. A thin strip f,preferably of metal, (shown sectioned in Fig. 2 and a partial edge Viewof which is shown in Fig. 3,) is pivoted ecc'entrically in the slottedend of the body a by a pin g, which passes transversely through the saidrule-body and is provided at its inner end with a head it, which engagesthe lower surface of the rule-body, as shown in Fig. 3. The strip f liesnormally within the slot e, and thus forms a rule member, which may beswung out of said slot and used as hereinafter described. The pin 9 isprovided with a removable button j, suitably connected therewith bymeans of threads at the end opposite the head h. A catch projects fromthe inner end of the strip 1 and extends beyond the adjacent end of therulebody, and by means thereof the said strip f may be readily pivotallymanipulated.

Pivotally mounted upon the upper face of the rule-body a by means of thepin g, which passes through an opening in the inner end thereof, is anarm Z, provided with a pointer m, which operates in connection with thescale 0, and the arm Z is provided with an end head n, having a pin-hole0, through which a pin 19, provided with a finger-piece q, is adapted topass, and the pointer m projects from the arm Z at such an angle asshall bring the pin-hole o in alinement with the zero scale-mark of thescale a when the said pointer registers therewith.

A slide a" is mounted upon the face of the rule-body and provided with alug s, which fits the groove d, and with an angular down--wardly-extending projection 25, provided with a lug it, which fits alongitudinal groove w, formed upon the edge of the rule-body 0ppositethe beveled edge Z). A thumb-screw m passes operatively through theslide 0 and engages the rule-body to lock the slide in adj ustedposition upon the rule-body. The slide 0" is also provided with apointer 1 which operates in connection with the scale c, and with acollar .2, connected with the angular projection t, and the collarzisprovide-d with a thumb-screw 4, by which a pencil 5 may be securedtherein. A line passing centrally through the collar 2 and the pointer ywill be at right angles with the scale 0.

The operation of my device will be evident from the foregoingdescription when taken in connection with the accompanying drawings andthe following statement thereof.

When it is desired to try the outer-surface square of a block or otherbody, the arm f is swung into the position shown at 6 in Fig. 1, and theblock fits between the rule-body and the arm f. When said arm 1' is inthe position shown at 7, one edge thereof springs tangentially from therounded end portion of the rule-body a, enabling said rule-body and rulemember to be readily fitted within a frame, as above set forth, whereasin the position shown at 6 neither edges of the rule member f projecttangentially from said-rounded end of the rule-body a, but the inneredge of said rule member and the adjacent edge of said rule-body form atrue square, by which the outer-surface square of a block or other bodymay be tried.

When it is desired to try the inner-surface square of a frame or otherconstruction, the arm f is swung into the position shown at 7 in Fig. 1,and the rule-body at and arm f are inserted within the frame and broughtagainst the sides thereof. The arm f is eccentrically pivoted to therule-body a, causing it to swing in different positions of arrangementwith relation thereto, as shown in dotted lines in Fig. 1. I

When it is desired to describe a circle or arc thereof of a givenradius, the pointer m is brought into registration with the zeromark ofthe scale 0, the button j is screwed down hard, and the pin 19 passedthrough the hole 0 in the arm Z, and a pencil 5 passed through thecollar 2 and secured therein by the screw 4, the slide r being adjustedso that the pointer y will register with the desired scale-graduation c.A true are or circle may then be drawn and of proper radius, the penciland pin by proportioning of the slide 1 and collar 2 and arm 1 beingequidistant from the scale 0.

When it is desired to use the device as a gage, the head h is brought tobear against the edge of the board or other article and the scale 0 isused to mark a point.

Having fully described my invention, I claim as new and desire to secureby Letters Patent- 1. In a device of the class described, a rulebodyprovided with a longitudinal face groove, and a longitudinal edgegroove, and with a scale upon the edge portion opposite said edgegroove, an arm pivoted to the end of said rule and provided with apointer adapted to operate in connection with said scale, a hole beingformed in the outer end of said arm, and adapted to receive a pin, aslide mounted upon said rule-body and provided with lugs which fit saidgrooves, and provided with a thumb-screw adapted to operate inconnection with said rule-body, and with a pointer adapted to operate inconnection with said scale, substantially as shown and described.

' 2. In a device of the class described, a rulebody provided with ascale, a device pivoted to said rule and adapted to operate inconnection with said scale, and to form an arcdescribing center, and anadjustable device mounted in connection with said rule-body, and adaptedto operate in connection with said scale and to hold a marking device,the relative construction and arrangement of parts being such that anarc may be described by said describing-center, and marking device witha radius accurately proportionable to a measurement laid off upon saidscale, substantially as shown and described.

3. The herein-described device, comprising a rule-body, a scale formedupon the surface thereof, devices pivoted to one end of and projectinglaterally from the side of said rulebody and adapted to operate inconnection with said scale, and to act as a center bearing fordescribing an arc, and an adjustable device mounted upon the surface ofsaid rulebody and operating in connection with said scale to hold amarking device, substantially as shown and described.

In testimony that I claim the foregoing as my invention I have signed myname, in presence of the subscribing witnesses, this 28th day of April,1899.

JOSEPH F. ROSE.

WVitnesses:

JAMES A. SLOOUM, A. LINCOLN HAMBLY.

